Which unit of speed will you use to express the speed of the following. 1. Aeroplane. 2.tortoise. 3.ant 4.horse

Write down the effect of humidity and temperature on the speed of sound.

finlep [7]

Answer:

The speed of sound is affected by temperature and humidity. Because it is less dense, sound passes through hot air faster than it passes through cold air. ... The attenuation of sound in air is affected by the relative humidity. Dry air absorbs far more acoustical energy than does moist air.

4 0

3 years ago

A student holds an egg outside of an open window and let's go. The window is 40 meters above the ground and the egg is falling u

melisa1 [442]

The distance traveled by the egg after 2 seconds is 19.6 m.

The given parameters:

Height of the window, h = 40 m

The distance traveled by the egg after 2 seconds is calculated as follows;

$h = v_0_y t + \frac{1}{2} gt^2\\\\$

where;

$v_0_y$ is the initial vertical velocity of the egg = 0
g is acceleration due to gravity = 9.8 m/s²
t is the time of motion, = 2 s

$h = 0 \ + \ \frac{1}{2} \times 9.8 \times (2)^2\\\\h = 19.6 \ m$

Thus, the distance traveled by the egg after 2 seconds is 19.6 m.

Learn more about second equation of motion here: brainly.com/question/7977693

5 0

3 years ago

The harder a gas pedal in a car is pressed the faster the car's velocity increases. Which phrase best describes the relationship

Contact [7]

Answer:

D

There is both a positive correlation and causation

7 0

3 years ago

A ball rolls down the street 9 meters in 3.5 seconds, what is it's average speed?

artcher [175]

How do we find the Average Speed ?

The Average Speed is the distance traveled for the object, divided by the elapsed time taken to travel that distance, so the formula is :

S = D / T

where S = Average Speed, D = Distance, and T = Times

Here the object is the ball, the distance is 9 meters and the time elapsed for the ball to roll down the street is 3.5 seconds. Applying the formula we get :

S = 9 / 3.5 ≈ 2.6 metres per second

The ≈ symbols (which is the wavy equal sign) means we can't write the exact result, because there is an infinite quantity of numbers after the decimal point. So we need to give an approximation, since the result is 2.57142857142857...etc. we choosed to round up the result to 2.6.

7 0

3 years ago

Read 2 more answers

A solenoid 1.39 m long and 3.20 cm in diameter carries a current of 17.1 A. The magnetic field inside the solenoid is 26.9 mT. F

Mariulka [41]

Explanation:

It is given that,

Length of the solenoid, l = 1.39 m

Diameter of the solenoid, d = 3.2 cm = 0.032 m

Radius of solenoid, r = 0.016 m

Magnetic field inside the solenoid, $B=26.9\ mT=26.9\times 10^{-3}\ T$